java.util.Calendar
The Calendar class is an abstract class that provides methods for converting between a specific instant in time and a set of calendar fields such as YEAR, MONTH, DAY_OF_MONTH, HOUR etc.
Calendar class declaration:
public abstract class Calendar extends Object implements Serializable, Cloneable, Comparable |
public abstract class Calendar extends Object implements Serializable, Cloneable, Comparable
Calendar provides a class method, getInstance which returns a Calendar object.
Calendar currentDate = Calendar.getInstance(); |
Calendar currentDate = Calendar.getInstance();
Java Calendar Class Methods
| Method | Description |
| abstract void add(int field, int amount) | Add or subtract the specified amount of time to the given calendar field, based on the calendar’s rules. |
| int get(int field) | Return the value of the given calendar field. |
| Static Calendar getInstance() | Get a calendar object using the default time zone and locale. |
| abstract int getMaximum(int field) | Return the maximum value for the given calendar field of this Calendar instance. |
| abstract int getMinimum(int field) | Return the minimum value for the given calendar field of this Calendar instance. |
| void set(int field, int value) | Set the given calendar field to the given value. |
| void setTime(Date date) | Set this Calendar’s time with the given Date. |
| Date getTime() | Return a Date object representing this Calendar’s time value. |
java.util.date class example
package com.w3spoint;
import java.util.Calendar;
public class CalenderTest {
public static void main(String args[]){
Calendar calendar = Calendar.getInstance();
System.out.println("The current date is : " + calendar.getTime());
calendar.add(Calendar.DATE, -10);
System.out.println("10 days ago: " + calendar.getTime());
calendar.add(Calendar.MONTH, 3);
System.out.println("3 months later: " + calendar.getTime());
calendar.add(Calendar.YEAR, 4);
System.out.println("4 years later: " + calendar.getTime());
int maximum = calendar.getMaximum(Calendar.DAY_OF_WEEK);
System.out.println("Maximum number of days in week: " + maximum);
maximum = calendar.getMaximum(Calendar.WEEK_OF_YEAR);
System.out.println("Maximum number of weeks in year: " + maximum);
int minimum = calendar.getMinimum(Calendar.DAY_OF_WEEK);
System.out.println("Minimum number of days in week: " + minimum);
minimum = calendar.getMinimum(Calendar.WEEK_OF_YEAR);
System.out.println("Minimum number of weeks in year: " + minimum);
}
} |
package com.w3spoint; import java.util.Calendar; public class CalenderTest {
public static void main(String args[]){
Calendar calendar = Calendar.getInstance();
System.out.println("The current date is : " + calendar.getTime());
calendar.add(Calendar.DATE, -10);
System.out.println("10 days ago: " + calendar.getTime());
calendar.add(Calendar.MONTH, 3);
System.out.println("3 months later: " + calendar.getTime());
calendar.add(Calendar.YEAR, 4);
System.out.println("4 years later: " + calendar.getTime());
int maximum = calendar.getMaximum(Calendar.DAY_OF_WEEK);
System.out.println("Maximum number of days in week: " + maximum);
maximum = calendar.getMaximum(Calendar.WEEK_OF_YEAR);
System.out.println("Maximum number of weeks in year: " + maximum);
int minimum = calendar.getMinimum(Calendar.DAY_OF_WEEK);
System.out.println("Minimum number of days in week: " + minimum);
minimum = calendar.getMinimum(Calendar.WEEK_OF_YEAR);
System.out.println("Minimum number of weeks in year: " + minimum);
}
}
Output:
The current date is : Mon Apr 09 19:26:10 IST 2018
10 days ago: Fri Mar 30 19:26:10 IST 2018
3 months later: Sat Jun 30 19:26:10 IST 2018
4 years later: Thu Jun 30 19:26:10 IST 2022
Maximum number of days in week: 7
Maximum number of weeks in year: 53
Minimum number of days in week: 1
Minimum number of weeks in year: 1 |
The current date is : Mon Apr 09 19:26:10 IST 2018
10 days ago: Fri Mar 30 19:26:10 IST 2018
3 months later: Sat Jun 30 19:26:10 IST 2018
4 years later: Thu Jun 30 19:26:10 IST 2022
Maximum number of days in week: 7
Maximum number of weeks in year: 53
Minimum number of days in week: 1
Minimum number of weeks in year: 1
